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ISR_TABLE_START = 0xfe00
ISR_TABLE_START_LO = 0xfe
ISR_TABLE_VALUE = 0xfd
ISR_TABLE_START_JP = 0xfdfd
EFX_TABLE_ADDR = 32000
EFX_IN_ADDR = EFX_TABLE_ADDR - 1
.area _HOME
.area _CODE
.area _INITIALIZER
.area _GSINIT
.area _GSFINAL
.area _DATA
.area _INITIALIZED
.area _BSEG
.area _BSS
.area _HEAP
.area _CODE
_main::
di
ld sp, #0
ei
ld hl, #EFX_TABLE_ADDR
ld (sfx_data), hl
ld hl, #ISR_TABLE_START
ld (hl), #ISR_TABLE_VALUE
ld e, l
ld d, h
inc de
ld bc, #257
ldir
ld a, #ISR_TABLE_START_LO
ld i, a
im 2
ld hl, #ISR_TABLE_START_JP
ld de, #isr
ld a, #0xc3
ld (hl), a
inc hl
ld (hl), e
inc hl
ld (hl), d
ei
ld a, (EFX_IN_ADDR)
ld l, a
call _beeper_queue
wait::
ld a, (sfx_type)
or a
jr nz, wait
halt
halt
halt
halt
out (0xff), a
di
halt
isr:
ex af,af
push hl
push ix
push iy
push bc
push de
call _beeper_play
pop de
pop bc
pop iy
pop ix
pop hl
ex af,af
ei
ret
.include "../sdcc/beeper.z80"
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